1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
|
/*
**
** Copyright 2009, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <stdlib.h>
#include <stdio.h>
#include "context.h"
#include "fp.h"
#include "state.h"
#include "matrix.h"
#include "vertex.h"
#include "light.h"
#include "primitives.h"
#include "texture.h"
#include "BufferObjectManager.h"
#include "TextureObjectManager.h"
#include <hardware/gralloc.h>
#include <hardware/copybit.h>
#include <private/ui/android_natives_priv.h>
#define DEBUG_COPYBIT true
// ----------------------------------------------------------------------------
namespace android {
static void textureToCopyBitImage(
const GGLSurface* surface, int32_t opFormat,
buffer_handle_t buffer, copybit_image_t* img)
{
img->w = surface->stride;
img->h = surface->height;
img->format = opFormat;
img->base = surface->data;
img->handle = (native_handle_t *)buffer;
}
struct clipRectRegion : public copybit_region_t {
clipRectRegion(ogles_context_t* c)
{
scissor_t const* scissor = &c->rasterizer.state.scissor;
r.l = scissor->left;
r.t = scissor->top;
r.r = scissor->right;
r.b = scissor->bottom;
next = iterate;
}
private:
static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
*rect = static_cast<clipRectRegion const*>(self)->r;
const_cast<copybit_region_t *>(self)->next = iterate_done;
return 1;
}
static int iterate_done(copybit_region_t const *, copybit_rect_t*) {
return 0;
}
copybit_rect_t r;
};
static bool supportedCopybitsFormat(int format) {
switch (format) {
case COPYBIT_FORMAT_RGBA_8888:
case COPYBIT_FORMAT_RGBX_8888:
case COPYBIT_FORMAT_RGB_888:
case COPYBIT_FORMAT_RGB_565:
case COPYBIT_FORMAT_BGRA_8888:
case COPYBIT_FORMAT_RGBA_5551:
case COPYBIT_FORMAT_RGBA_4444:
case COPYBIT_FORMAT_YCbCr_422_SP:
case COPYBIT_FORMAT_YCbCr_420_SP:
return true;
default:
return false;
}
}
static bool hasAlpha(int format) {
switch (format) {
case COPYBIT_FORMAT_RGBA_8888:
case COPYBIT_FORMAT_BGRA_8888:
case COPYBIT_FORMAT_RGBA_5551:
case COPYBIT_FORMAT_RGBA_4444:
return true;
default:
return false;
}
}
static inline int fixedToByte(GGLfixed val) {
return (val - (val >> 8)) >> 8;
}
/**
* Performs a quick check of the rendering state. If this function returns
* false we cannot use the copybit driver.
*/
static bool checkContext(ogles_context_t* c) {
// By convention copybitQuickCheckContext() has already returned true.
// avoid checking the same information again.
if (c->copybits.blitEngine == NULL) {
LOGD_IF(DEBUG_COPYBIT, "no copybit hal");
return false;
}
if (c->rasterizer.state.enables
& (GGL_ENABLE_DEPTH_TEST|GGL_ENABLE_FOG)) {
LOGD_IF(DEBUG_COPYBIT, "depth test and/or fog");
return false;
}
// Note: The drawSurfaceBuffer is only set for destination
// surfaces types that are supported by the hardware and
// do not have an alpha channel. So we don't have to re-check that here.
static const int tmu = 0;
texture_unit_t& u(c->textures.tmu[tmu]);
EGLTextureObject* textureObject = u.texture;
if (!supportedCopybitsFormat(textureObject->surface.format)) {
LOGD_IF(DEBUG_COPYBIT, "texture format not supported");
return false;
}
return true;
}
static bool copybit(GLint x, GLint y,
GLint w, GLint h,
EGLTextureObject* textureObject,
const GLint* crop_rect,
int transform,
ogles_context_t* c)
{
// We assume checkContext has already been called and has already
// returned true.
const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
y = cbSurface.height - (y + h);
const GLint Ucr = crop_rect[0];
const GLint Vcr = crop_rect[1];
const GLint Wcr = crop_rect[2];
const GLint Hcr = crop_rect[3];
GLint screen_w = w;
GLint screen_h = h;
int32_t dsdx = Wcr << 16; // dsdx = ((Wcr/screen_w)/Wt)*Wt
int32_t dtdy = Hcr << 16; // dtdy = -((Hcr/screen_h)/Ht)*Ht
if (transform & COPYBIT_TRANSFORM_ROT_90) {
swap(screen_w, screen_h);
}
if (dsdx!=screen_w || dtdy!=screen_h) {
// in most cases the divide is not needed
dsdx /= screen_w;
dtdy /= screen_h;
}
dtdy = -dtdy; // see equation of dtdy above
if (dsdx < c->copybits.minScale || dsdx > c->copybits.maxScale
|| dtdy < c->copybits.minScale || dtdy > c->copybits.maxScale) {
// The requested scale is out of the range the hardware
// can support.
LOGD_IF(DEBUG_COPYBIT,
"scale out of range dsdx=%08x (Wcr=%d / w=%d), "
"dtdy=%08x (Hcr=%d / h=%d), Ucr=%d, Vcr=%d",
dsdx, Wcr, w, dtdy, Hcr, h, Ucr, Vcr);
return false;
}
// copybit doesn't say anything about filtering, so we can't
// discriminate. On msm7k, copybit will always filter.
// the code below handles min/mag filters, we keep it as a reference.
#ifdef MIN_MAG_FILTER
int32_t texelArea = gglMulx(dtdy, dsdx);
if (texelArea < FIXED_ONE && textureObject->mag_filter != GL_LINEAR) {
// Non-linear filtering on a texture enlargement.
LOGD_IF(DEBUG_COPYBIT, "mag filter is not GL_LINEAR");
return false;
}
if (texelArea > FIXED_ONE && textureObject->min_filter != GL_LINEAR) {
// Non-linear filtering on an texture shrink.
LOGD_IF(DEBUG_COPYBIT, "min filter is not GL_LINEAR");
return false;
}
#endif
const uint32_t enables = c->rasterizer.state.enables;
int planeAlpha = 255;
static const int tmu = 0;
texture_t& tev(c->rasterizer.state.texture[tmu]);
int32_t opFormat = textureObject->surface.format;
const bool srcTextureHasAlpha = hasAlpha(opFormat);
if (!srcTextureHasAlpha) {
planeAlpha = fixedToByte(c->currentColorClamped.a);
}
const bool cbHasAlpha = hasAlpha(cbSurface.format);
bool blending = false;
if ((enables & GGL_ENABLE_BLENDING)
&& !(c->rasterizer.state.blend.src == GL_ONE
&& c->rasterizer.state.blend.dst == GL_ZERO)) {
// Blending is OK if it is
// the exact kind of blending that the copybits hardware supports.
// Note: The hardware only supports
// GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA,
// But the surface flinger uses GL_ONE / GL_ONE_MINUS_SRC_ALPHA.
// We substitute GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA in that case,
// because the performance is worth it, even if the results are
// not correct.
if (!((c->rasterizer.state.blend.src == GL_SRC_ALPHA
|| c->rasterizer.state.blend.src == GL_ONE)
&& c->rasterizer.state.blend.dst == GL_ONE_MINUS_SRC_ALPHA
&& c->rasterizer.state.blend.alpha_separate == 0)) {
// Incompatible blend mode.
LOGD_IF(DEBUG_COPYBIT, "incompatible blend mode");
return false;
}
blending = true;
} else {
if (cbHasAlpha) {
// NOTE: the result will be slightly wrong in this case because
// the destination alpha channel will be set to 1.0 instead of
// the iterated alpha value. *shrug*.
}
// disable plane blending and src blending for supported formats
planeAlpha = 255;
if (opFormat == COPYBIT_FORMAT_RGBA_8888) {
opFormat = COPYBIT_FORMAT_RGBX_8888;
} else {
if (srcTextureHasAlpha) {
LOGD_IF(DEBUG_COPYBIT, "texture format requires blending");
return false;
}
}
}
switch (tev.env) {
case GGL_REPLACE:
break;
case GGL_MODULATE:
// only cases allowed is:
// RGB source, color={1,1,1,a} -> can be done with GL_REPLACE
// RGBA source, color={1,1,1,1} -> can be done with GL_REPLACE
if (blending) {
if (c->currentColorClamped.r == c->currentColorClamped.a &&
c->currentColorClamped.g == c->currentColorClamped.a &&
c->currentColorClamped.b == c->currentColorClamped.a) {
// TODO: Need to emulate: RGBA source, color={a,a,a,a} / premult
// and RGBA source, color={1,1,1,a} / regular-blending
// (both are equivalent)
}
}
LOGD_IF(DEBUG_COPYBIT, "GGL_MODULATE");
return false;
default:
// Incompatible texture environment.
LOGD_IF(DEBUG_COPYBIT, "incompatible texture environment");
return false;
}
// LOGW("calling copybits");
copybit_device_t* copybit = c->copybits.blitEngine;
copybit_image_t dst;
buffer_handle_t target_hnd = c->copybits.drawSurfaceBuffer;
textureToCopyBitImage(&cbSurface, cbSurface.format, target_hnd, &dst);
copybit_rect_t drect = {x, y, x+w, y+h};
copybit_image_t src;
buffer_handle_t source_hnd = textureObject->buffer->handle;
textureToCopyBitImage(&textureObject->surface, opFormat, source_hnd, &src);
copybit_rect_t srect = { Ucr, Vcr + Hcr, Ucr + Wcr, Vcr };
copybit->set_parameter(copybit, COPYBIT_TRANSFORM, transform);
copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, planeAlpha);
copybit->set_parameter(copybit, COPYBIT_DITHER,
(enables & GGL_ENABLE_DITHER) ? COPYBIT_ENABLE : COPYBIT_DISABLE);
clipRectRegion it(c);
status_t err = copybit->stretch(copybit, &dst, &src, &drect, &srect, &it);
if (err != NO_ERROR) {
c->textures.tmu[0].texture->try_copybit = false;
}
return err == NO_ERROR ? true : false;
}
/*
* Try to draw a triangle fan with copybit, return false if we fail.
*/
bool drawTriangleFanWithCopybit_impl(ogles_context_t* c, GLint first, GLsizei count)
{
if (!checkContext(c)) {
return false;
}
// FIXME: we should handle culling here
c->arrays.compileElements(c, c->vc.vBuffer, 0, 4);
// we detect if we're dealing with a rectangle, by comparing the
// rectangles {v0,v2} and {v1,v3} which should be identical.
// NOTE: we should check that the rectangle is window aligned, however
// if we do that, the optimization won't be taken in a lot of cases.
// Since this code is intended to be used with SurfaceFlinger only,
// so it's okay...
const vec4_t& v0 = c->vc.vBuffer[0].window;
const vec4_t& v1 = c->vc.vBuffer[1].window;
const vec4_t& v2 = c->vc.vBuffer[2].window;
const vec4_t& v3 = c->vc.vBuffer[3].window;
int l = min(v0.x, v2.x);
int b = min(v0.y, v2.y);
int r = max(v0.x, v2.x);
int t = max(v0.y, v2.y);
if ((l != min(v1.x, v3.x)) || (b != min(v1.y, v3.y)) ||
(r != max(v1.x, v3.x)) || (t != max(v1.y, v3.y))) {
LOGD_IF(DEBUG_COPYBIT, "geometry not a rectangle");
return false;
}
// fetch and transform texture coordinates
// NOTE: maybe it would be better to have a "compileElementsAll" method
// that would ensure all vertex data are fetched and transformed
const transform_t& tr = c->transforms.texture[0].transform;
for (size_t i=0 ; i<4 ; i++) {
const GLubyte* tp = c->arrays.texture[0].element(i);
vertex_t* const v = &c->vc.vBuffer[i];
c->arrays.texture[0].fetch(c, v->texture[0].v, tp);
// FIXME: we should bail if q!=1
c->arrays.tex_transform[0](&tr, &v->texture[0], &v->texture[0]);
}
const vec4_t& t0 = c->vc.vBuffer[0].texture[0];
const vec4_t& t1 = c->vc.vBuffer[1].texture[0];
const vec4_t& t2 = c->vc.vBuffer[2].texture[0];
const vec4_t& t3 = c->vc.vBuffer[3].texture[0];
int txl = min(t0.x, t2.x);
int txb = min(t0.y, t2.y);
int txr = max(t0.x, t2.x);
int txt = max(t0.y, t2.y);
if ((txl != min(t1.x, t3.x)) || (txb != min(t1.y, t3.y)) ||
(txr != max(t1.x, t3.x)) || (txt != max(t1.y, t3.y))) {
LOGD_IF(DEBUG_COPYBIT, "texcoord not a rectangle");
return false;
}
if ((txl != 0) || (txb != 0) ||
(txr != FIXED_ONE) || (txt != FIXED_ONE)) {
// we could probably handle this case, if we wanted to
LOGD_IF(DEBUG_COPYBIT, "texture is cropped: %08x,%08x,%08x,%08x",
txl, txb, txr, txt);
return false;
}
// at this point, we know we are dealing with a rectangle, so we
// only need to consider 3 vertices for computing the jacobians
const int dx01 = v1.x - v0.x;
const int dx02 = v2.x - v0.x;
const int dy01 = v1.y - v0.y;
const int dy02 = v2.y - v0.y;
const int ds01 = t1.S - t0.S;
const int ds02 = t2.S - t0.S;
const int dt01 = t1.T - t0.T;
const int dt02 = t2.T - t0.T;
const int area = dx01*dy02 - dy01*dx02;
int dsdx, dsdy, dtdx, dtdy;
if (area >= 0) {
dsdx = ds01*dy02 - ds02*dy01;
dtdx = dt01*dy02 - dt02*dy01;
dsdy = ds02*dx01 - ds01*dx02;
dtdy = dt02*dx01 - dt01*dx02;
} else {
dsdx = ds02*dy01 - ds01*dy02;
dtdx = dt02*dy01 - dt01*dy02;
dsdy = ds01*dx02 - ds02*dx01;
dtdy = dt01*dx02 - dt02*dx01;
}
// here we rely on the fact that we know the transform is
// a rigid-body transform AND that it can only rotate in 90 degrees
// increments
int transform = 0;
if (dsdx == 0) {
// 90 deg rotation case
// [ 0 dtdx ]
// [ dsdx 0 ]
transform |= COPYBIT_TRANSFORM_ROT_90;
// FIXME: not sure if FLIP_H and FLIP_V shouldn't be inverted
if (dtdx > 0)
transform |= COPYBIT_TRANSFORM_FLIP_H;
if (dsdy < 0)
transform |= COPYBIT_TRANSFORM_FLIP_V;
} else {
// [ dsdx 0 ]
// [ 0 dtdy ]
if (dsdx < 0)
transform |= COPYBIT_TRANSFORM_FLIP_H;
if (dtdy < 0)
transform |= COPYBIT_TRANSFORM_FLIP_V;
}
//LOGD("l=%d, b=%d, w=%d, h=%d, tr=%d", x, y, w, h, transform);
//LOGD("A=%f\tB=%f\nC=%f\tD=%f",
// dsdx/65536.0, dtdx/65536.0, dsdy/65536.0, dtdy/65536.0);
int x = l >> 4;
int y = b >> 4;
int w = (r-l) >> 4;
int h = (t-b) >> 4;
texture_unit_t& u(c->textures.tmu[0]);
EGLTextureObject* textureObject = u.texture;
GLint tWidth = textureObject->surface.width;
GLint tHeight = textureObject->surface.height;
GLint crop_rect[4] = {0, tHeight, tWidth, -tHeight};
const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
y = cbSurface.height - (y + h);
return copybit(x, y, w, h, textureObject, crop_rect, transform, c);
}
/*
* Try to drawTexiOESWithCopybit, return false if we fail.
*/
bool drawTexiOESWithCopybit_impl(GLint x, GLint y, GLint z,
GLint w, GLint h, ogles_context_t* c)
{
// quickly process empty rects
if ((w|h) <= 0) {
return true;
}
if (!checkContext(c)) {
return false;
}
texture_unit_t& u(c->textures.tmu[0]);
EGLTextureObject* textureObject = u.texture;
return copybit(x, y, w, h, textureObject, textureObject->crop_rect, 0, c);
}
} // namespace android
|